Solid phase
Official name
Cetrimonium bromide
Secondary names
Hexadecyl(trimethyl)ammonium bromide; Cetyltrimethylammonium bromide
CAS number
57-09-0
Type
Family
molecular solid
Class
mixed molecular solid
Compound type
organic molecular solid
Chemical composition
Formula
CH3(CH2)15N+(CH3)3⋅Br−
Chemical formula
CH3(CH2)15(N+)(CH3)3.Br-
Elemental formula
C19 H42 Br N
Isotope mixture type
terrestrial abundance
2.0
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
CH3(CH2)15N+(CH3)3⋅Br− Cetrimonium bromide molecule 1 1.0 1 pure main
Chemical functions
  Function Number
R−CH3 4
R−CH2−R 15
R4>∣N+ 1
Chemical bonds
  Bond Number
>∣N+⋅Br− 1
≥C−H 42
≥C−C≤ 15
≥C−N+≤ 4
Class
molecular solids with polar molecules (02)
Type
with polyatomic organic polar molecules (CnHm...) (02.01)
Group
mixed hydrocarbons (02.01.05)
Phase type
crystalline
Molar mass
364.45 g/mol
State NTP
solid
Phase transitions
Phase transition type Other phases Temperature - Pressure
solid-liquid liquid 237-243°C (510-516K)
Refringence type
unknown
Pure color
colorless
Color
white
Diaphaneity
translucent
Luster
waxy
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